Fahria, et al. “Evaluation of Simultaneous and Simultaneous Spatial Autoregressive Equation With Three Stage Least Square Method (Case Study on GRDP, Poverty and Unemployment Data in Papua in 2018)”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 53, no. 1, July 2020, pp. 95-107, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/11475.